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(1) No image appears (entirely white).
Print example
Defective
transfer
bias output.
Defective
developer
bias output.
No LSU
laser is out-
put.
(2) No image appears (entirely black).
Print example
No main
charging.
Service Manual
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective high voltage PWB
sub.
Defective engine PWB.
Defective connector cable
or poor contact in the con-
nector.
Defective high voltage
PWB.
Defective engine PWB.
Defective laser scanner
unit.
Defective engin PWB.
Causes
Defective connector cable
or poor contact in the con-
nector.
Defective charger roller unit. Replace the charger roller unit
Defective high voltage
PWB.
Defective engine PWB.
1-4-76
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity of the connector cable. If necessary,
replace the cable.
High voltage PWB and engine PWB (YC6)
High voltage PWB sub and engine PWB (YC7)
Replace the high voltage PWB.
(see page 1-5-39)
Replace the high voltage PWB sub.
Replace the engine PWB (see page 1-5-33).
Reinsert the connector. Also check for conti-
nuity of the connector cable. If necessary,
replace the cable.
High voltage PWB and engine PWB (YC6)
Replace the high voltage PWB.
(see page 1-5-39)
Replace the engine PWB (see page 1-5-33).
Replace the laser scanner unit
(see page 1-5-20).
Replace the engine PWB (see page 1-5-33).
Check procedures/corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
High voltage PWB and engine PWB (YC6)
(see page 1-5-15).
Replace the high voltage PWB.
(see page 1-5-39)
Replace the engine PWB (see page 1-5-33).
2NP-5
Y116141-8
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